A photonic equivalent to disclination in crystals has been used to produce orbital angular momentum laser light directly on-chip, ushering in compact and efficient twisted-light lasers.
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Forbes, A. On-chip lasers with twisted light. Nat. Photon. 18, 209–210 (2024). https://doi.org/10.1038/s41566-024-01397-z
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DOI: https://doi.org/10.1038/s41566-024-01397-z
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